libvideorender: CF2 add keep last frame for weston [1/1]

PD#TV-114757

Problem:
open source code of weston don't keep last frame when
playback end

Solution:
1.add aml config api for weston
2.add keep last frame feature

Verify:
ap222

Change-Id: I8368d5395160c8e4a0803bd9e21a7f85ef002985
Signed-off-by: fei.deng <fei.deng@amlogic.com>
7 files changed